A better publishing mechanism for Wubi

Right now, Wubi is built locally, then uploaded by Evan to http://people.canonical.com/~evand/wubi . This has meant that, on occasion, changes to grub that affect Wubi users, as well as milestone CD builds block on Evan.

We should fix this bottleneck by making publishing of new Wubi binaries an automated process. This should, if possible, also sign the Wubi binary.

Related bugs

Sprints

Whiteboard

We could:
* use newer python (ctypes, subprocess included) (not cross-compile, use pre-build)
* use matchin pycrypto (not cross-compile, use pre-build)
* use mock from the archive
* cross-compile 7zip
* cross-compile resize2fs (and dependencies)
* pylauncher is good and small, let's keep it (py2exe doesn't work under wine, out of the picture. pyinstaller is the "new" kid in town which is considering to remove wine support...)
* make it produce the wubi build headless

Cross-compiling python would be asking for a full mingw-w64 cross-compiled partial-arch.
This will not make it fully build from source due to embedding windows python & pycrypto builds.

For an automatic build in a PPA, i'd propose the following:
* upgrade to python2.4 (first one that has automatic MSI package)
* include all dependencies as *.msi packages or pre-builds
* in a recipe build: install all *.msi packages and build wubi.exe and shove it into a deb package =)
* WIN!